title: Alteration in copy numbers of genes as a mechanism for acquired drug resistance.
mesh_terms: D018528:ATP-Binding Cassette Transporters / Q000235:genetics; D017209:Apoptosis / Q000187:drug effects; D002166:Camptothecin / Q000494:pharmacology; D045744:Cell Line, Tumor; D003561:Cytarabine / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D005047:Etoposide / Q000494:pharmacology; D005784:Gene Amplification; D018628:Gene Dosage; D019254:Genes, bcl-2; D006801:Humans
chemical_list: D018528:ATP-Binding Cassette Transporters; D003561:Cytarabine; D005047:Etoposide; D002166:Camptothecin